{"id":63837,"date":"2025-09-17T11:15:14","date_gmt":"2025-09-17T05:45:14","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=63837"},"modified":"2025-09-17T11:15:54","modified_gmt":"2025-09-17T05:45:54","slug":"himalayan-rains-topography-and-climate-change-explained","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/himalayan-rains-topography-and-climate-change-explained\/","title":{"rendered":"Himalayan Rains: Topography and Climate Change Explained"},"content":{"rendered":"<h2><b>Himalayan Rainfall and Climate Change Latest News<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dehradun and several districts of Uttarakhand have seen very heavy rainfall in recent days, triggering landslides, swollen rivers, and at least 15 deaths.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Over the past month, both Uttarakhand and Himachal Pradesh have witnessed repeated incidents of cloudbursts, flash floods, mudslides, and damaged communication networks.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">While such events are typical of the monsoon, their growing frequency and intensity in recent years have raised serious concerns about safety and resilience in the Himalayan region.<\/span><\/li>\n<\/ul>\n<h2><b>Why Hilly Regions Receive More Rainfall<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This monsoon, the northwestern region has seen unusually high rainfall, with 34% surplus in August and over 67% above normal in early September.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Consecutive low-pressure systems from the Bay of Bengal moved farther north, intensifying rains.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In hilly areas like the western Himalayas, <\/span><b>geography amplifies the impact<\/b><span style=\"font-weight: 400;\">: <\/span><span style=\"font-weight: 400;\">rising air forms massive, steep clouds that release heavy local precipitation<\/span><span style=\"font-weight: 400;\">.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Such rainfall levels, manageable in coastal states like Goa or Kerala, trigger disasters in mountains.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">For example, Udhampur in J&amp;K recorded 630 mm in 24 hours \u2014 equal to Rajkot\u2019s annual rainfall \u2014 while Leh received 59 mm in two days, a record since 1973.<\/span><\/li>\n<\/ul>\n<h2><b>Why Hilly Regions Face Greater Disaster Risks<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In plains, <\/span><b>heavy rainfall usually drains into rivers or local water bodies<\/b><span style=\"font-weight: 400;\">, but in <\/span><span style=\"font-weight: 400;\">mountains it often triggers landslides, mudslides, and flash floods as water rushes downhill carrying mud, soil, and debris<\/span><span style=\"font-weight: 400;\">.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This has recently occurred in Mandi, Kullu, Dharali, Tharali, and Jammu.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">When major rivers get choked, overflowing water and debris can inundate settlements, destroying roads and bridges.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">However, not every cloudburst results in disaster \u2014 the impact depends on local factors, such as slope stability and whether debris falls into river channels.<\/span><\/li>\n<\/ul>\n<h2><b>Climate Change and Himalayan Rainfall Extremes<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Recent years show a southward shift of western disturbances \u2014 wind systems from the Mediterranean that bring rain and snow to northern India.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Their increasing interaction with southwest monsoon currents, driven by global warming, has complicated rainfall patterns over the Himalayas.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">This shift is linked to more frequent extreme rainfall events and longer dry spells.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Additionally, Arctic Sea ice melting may further influence these changing monsoon dynamics, raising concerns about heightened climate risks in hilly regions.<\/span><\/li>\n<\/ul>\n<h2><b>Why the Himalayas Are Prone to Cloudbursts<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The Himalayas, positioned where <\/span><b>moist tropical monsoon winds meet mid-latitude westerlies<\/b><span style=\"font-weight: 400;\">, experience <\/span><b>strong uplift and instability that often trigger cloudbursts<\/b><span style=\"font-weight: 400;\">.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Warm, moisture-rich air forced up the slopes cools quickly, condenses, and produces intense, localised downpours.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Climate change is worsening this vulnerability: rapid Arctic warming weakens the jet stream, causing westerly troughs to interact more with monsoon currents, while warmer air carries more moisture, intensifying rainfall.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A slower, wavering jet stream makes storms linger, leading to prolonged heavy rain and devastating floods \u2014 trends already seen globally, including in Germany (2021), Pakistan (2010), and West Asia (2024).<\/span><\/li>\n<\/ul>\n<h2><b>Observational Tools and Their Limitations in Forecasting Cloudbursts<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cloudburst forecasting relies on Doppler Weather Radars (DWRs), satellites, rain gauges, GPS-based moisture monitoring, and high-resolution numerical weather prediction (NWP) models.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">While DWRs provide detailed cloud and rainfall structures, their <\/span><b>coverage is limited in Himalayan terrain<\/b><span style=\"font-weight: 400;\">.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Rain gauges and automatic weather stations offer accurate point data but lack spatial density.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Satellites like INSAT-3D\/3DR, GPM, and Himawari capture convective growth and rainfall but struggle with coarse resolution and biases in rugged topography.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">NWP models simulate convection and storm dynamics but require very fine resolution (&lt;1 km), precise initial conditions, and explicit process representation, making sudden bursts hard to predict.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">To improve accuracy, denser observation networks, advanced models with better cloudburst representation, and AI\/ML integration for data assimilation are essential.<\/span><\/li>\n<\/ul>\n<p><b>Source:<\/b> <a href=\"https:\/\/indianexpress.com\/article\/explained\/explained-climate\/topography-climate-change-behind-heavy-rains-in-himalayas-10254105\/\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"font-weight: 400;\">IE<\/span><\/a><span style=\"font-weight: 400;\"> | <\/span><a href=\"https:\/\/www.financialexpress.com\/opinion\/explainer-why-is-it-pouring-in-india-this-monsoon\/3977722\/\" target=\"_blank\" rel=\"nofollow noopener\"><span style=\"font-weight: 400;\">FE<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Extreme Himalayan rains are rising due to topography, shifting weather systems, and climate change, making the region more vulnerable to floods, landslides, and cloudbursts.<\/p>\n","protected":false},"author":18,"featured_media":63847,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18],"tags":[2737,60,22,59],"class_list":{"0":"post-63837","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-mains-current-affairs","8":"tag-himalayan-rainfall-and-climate-change","9":"tag-mains-articles","10":"tag-upsc-current-affairs","11":"tag-upsc-mains-current-affairs","12":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/63837","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=63837"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/63837\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/63847"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=63837"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=63837"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=63837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}